Draft-regulator for locomotive smoke-stacks



(No Model.)

P. STRATTNER. i DRAFT REGULATOR PoR LoooMoTTvR SMOKE STAGES.

No. 492,246. Patented Feb. 21, 1893.

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/N V NTOR ATTORNEYS,

W/T/VESSES:

UNTTED STATES PATENT @Errol-3.

FREDERICK STRATTNER, OF SALISBURY, MARYLAND, ASSIGNOR -OF ONE- I-IALF T VVILLARD THOMSON, OE VILMINGTON, DELAWARE.

YDRFTHREGULATOR FOR LOCOMOTIVE SMOKE-STACKS.

SPECIFICATION forming part of Letters Patent No. 492,246, dated February 21, 1893. Application filed December 9, 1892. Serial No. 454,646. (No model.)

1o will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to smoke-stacks for locomotive furnaces, and the object in View is to secure a steady uniform draft through the smoke-box or chamber and stack of the furnace, particularly where artificial draft is used such as exhaust or live steam as is usual in the case of locomotive furnaces. I accomplish this end in a simple and inexpensive zo manner by providing a tapered nozzle or pipe which is secured in the lower part of the smoke-stack, with its large open end arranged to receive the exhaust-steam and smoke from the smoke-box of a locomotive-furnace. As the smoke and steam pass rapidly from the smoke -box directly into the tapered nozzle or pipe, theyarecontracted or condensed as they pass through said pipe, and when they emerge from the tapered nozzle or pipe into the larger surrounding space of the smokestack, they are free to again expand. This tapered nozzle or pipe situated at the opening between the smoke-stack and the smokechamber or box of the locomotive furnace, serves to prevent any backflow or pressure of atmospheric air into the smoke-box and also to partially condense the escaping steam and smoke, whereby the draft through the smoke stack and smoke box is made more regular and uniform.

4For the purpose of varying the size of the exit ofthe tapered condensing nozzle or pipe, to determine the area of the discharge orice in the nozzle best calculated to give the most advantageous results, I contemplate making the tapered nozzle in sections, hinged or pivoted together at the lower end and having mechanical devices wherebythe upper end can be spread apart or brought together to vary the size of the exit at the top of the noz- 5o zle or pipe. I also contemplate the use of a series of spirally arranged Ways or flanges on the inside of the tapered nozzle or pipe, which llangesconverge in spiral lines from the bottom toward the top of the nozzle and serve to give to the passing steam and smoke,

as the same impinge against the flanges, a whirling motion while passing through the nozzle.

I have illustrated my improvements in the 6o accompanying drawings, forming a part of this specification, and in Whichs- Figure l is a vertical sectional View through so much of a locomotive-furnace as is necessary to a proper understanding of my invention. Fig. 2 is an enlarged sectional view, at right angles to Fig. l, showing the steamcondensing nozzle made in adjustable sections. Fig. 3 is a detail sectional view to illustrate the form of joint between the noz- 7o zle sections and the means for moving each section independently of the other. Figs. 4 and 5 are sectional and plan views, respectively, of a steam-condensing nozzle with internal spiral flanges.

Like letters of reference denote like parts in all thefigures of the drawings, referring to which:-

A designates the smokebox of a locomotive furnace, B is the smoke stack, C the 8o steam chests, D the live steam pipes arranged within the smoke box and discharging into the steam chests, and E the exhaust-nozzle which receives the exhaust steam from the chests and discharges into the smoke-box immediately beloWthe smokestack,allof which parts are arranged and operated ina manner Well known to those skilled in the art to which my Vimprovement relates.

F is my tapered nozzle which is secured in 9o the lower part of the stack B immediately above the smoke-chamber or box A of the locomotive-furnace. This tapered nozzle is arranged in a vertical position, with its large open end next to the smoke-box to receive the smoke and exhaust steam directly therefrom; and the contracted upper end of this tapered nozzle projects Well up into the smoke-stack regular and uniform, and the nozzle prevents i any back flow of atmospheric air into the smoke-box.

The tapered nozzle is provided on its inside with a series of iianges G which are arranged spirally Within the nozzle and extend from the lower end thereof to the upper contracted i end, said iianges serving to give to the steam and smoke a whirling motion as they pass from the smoke-box through the nozzle into the smoke-stack. I do not, however, restrict my invention to the nozzle made in a single imperforate piece, as it canbe made of adjustable sections or parts so connected that the` upper exit rend thereof can be made larger or smaller so that the area of the exit opening can be varied to secure the best results iny practice. The nozzle can be ymade in 4two sections f,f, having the same generally tapered 1 form, and with their adjacent side edges -bev- Y eled or cut away to vform the lap joints, g, g, so that when the sections are expanded or contracted the side edges of the sections will At one side, the sections areconnected together by a pivotal bolt, 7L,Iv while at theot'her side the sections are pivotally connected by devices whichl enable the sections to be moved relatively to each otherf so 4that the area of the exit at the top of the nozzle can be increased or diminished. To"

be closed together.

one of the sections, f, of the nozzle is secured a sleeve, 2', having a crankor handle t" so that the section can be moved; and through this' sleeve passes a short pivotal shaft j, having its inner end made square or of other pol 1g-` onal form and fitted in a corresponding opening vin the other section, f ,of the nozzle. Thei inner end 'of this shaft is'thus connected to the section f of the nozzle, and it has a key j to prevent endwise movement of said shaft,

while its outer end has a crank or handle 7c by which it can be conveniently turned to ad-` The sleevey just the section f of the nozzle. and shaft pass through a suitable opening in the side of the smoke-stack, and the cranks stack.

The operation and advantages of my invention `will be readily understood and apprecin ated by those skilled in the art from the foregoing description taken in connection with the drawings. v

I am aware that changes in the form and proportion of parts and details of construction of the mechanism herein shown andfdescribed as an embodiment of my invention can be made without departing from the spirit or sacrificing the advantages thereof, and' I therefore reserve the right to make such modi-.

iications as fairly fall within the scope of my invention.

I would have it understood that I do not strictly confine my invention to a furnace of a locomotive steam engine, as it is evident that the improvements can be used in connection with other forms of furnaces or boilers; nor do I strictly limit myself to the oo n- .densing nozzle `made circular in cross section as said nozzle can be made square or of `other desired form in cross section although Iit is tapered longitudinally, `for the purposes explained.

l. The combination with a smoke-box, an exhaust nozzle therein, and a smoke-,svtaclnof a tapered nozzle situated in the lower part of the smoke-stack, with its large open end in position to receive from the smoke-box and .exhaust nozzle and with its contracted dis-y charge end projected up into the smokestack, substantially as and for the purpose described.

2. The combination with a smoke-box and a smoke-stack, of a tapered nozzle situated .Within the lo-Wer part of said smoke-stack and .provided with a series .of internal spiral {flanges, substantially as `and for the purpose described.

3. The combination with a smoke chamber and a-smoke stack, of a tapered nozzle situated in thelower part of the smoke stack to receive from the smoke chamber and constructed in sections adapted to be expanded ,or contracted, and means for moving either section Aindependently of the other, substantially as and for the purpose described.

` 4. The combination witha smokechamber and a smoke-stack, of a tapered sectional nozzle situated in the lower part of the smoke stack to receive directly from the smoke ,chamber and having its members or sections pivoted for independent adjustment, and means, substantially as described, for moving either section ofthe nozzle independently of the other section, as set forth.

5. The combination with a smoke chamber and a smoke stack, of a tapered nozzlesituated in the lower part of the smoke stack to receive directly from the smoke chamber and comprising the pivoted sections provided at their contiguous edges withthe lap joints, and one of the sections having means for mov'- ing the same toward or from the other sec IOO tion, substantially as and for the purpose described.

6. A tapered nozzle, substantially such as described, consisting of the sections having `the lap joints along their contiguous edges, a

sleeve rigid with one of the sections and provided With a hand1e,and a pivotal shaft pass ing through the sleeve and having one end rigid with the other section audits outer end FREDERICK STRATINER.

Witnesses:

JEROME TUBES, M. V. BREWINGTON. 

